Adhesive bandage



March 6, 1.95]

H. J. HELDMANN ADHESIVE BANDAGE Filed July 16, 1948 1w VENT'QQ.

HENRY JOHN HELDMHIV/V ZQZM Patented Mar. 6, 1 951 UNITED STATES PATENT OFFICE I 2,544,315 ADHESIVE BANDAGE Henry John Heldmann, Kitchener, Ontario, Canada, assignor to Cress Laboratories, Kitch-' ener, Ontario, Canada, a partnership Application July 16, 1948, Serial No. 39,130

medicament provided is frequently of limited effectiveness,

It is an object of this invention to provide an improved adhesive bandage comprising a thin transparent highly flexible strip.

It is a further object of the present invention to provide a wound aid comprising a medicament of substantial effectiveness and a carrying me: dium therefor comprising a thin transparent highly flexible adhesive strip whereby .the wound aid in use causes .a minimum of annoyance to the wearer due to its small bulk and pliability and which is relatively inconspicuous due to its transparency. A further object resides in the provision of a metallic foil sheet overlying the adhesive surface of the carrying strip and adapted to contribute to the effective use of the wound aid.

The invention will be described with reference to the accompanying drawing, in which Figure l is an elevation of a medicated adhesive bandage in accordance with the invention,

Figure 2 is a plan view of the medicated adhesive bandage,

Figure 3 is a plan view of a wound aid in accordance with the invention,

Figure 4 is a longitudinal sectional view of the wound aid in exaggerated thickness for clarity of illustration,

Figure 5 is a plan view of one side of an assembly of wound aids,

Figure 6 is a plan view of the other side of the assembly, I

Figure 7 is a plan view of one side of a modified form of wound aid,

Figure 8 is a plan view of the other side of the wound aid shown in Figure '7,

Figure 9 is a longitudinal sectional view of the Wound aid shown in Figure '7, and s Figure 10 is a greatly enlarged sectional view, in perspective, of a portion of the wound aid.

Referring to Figures 1 and 2, the bandage shown comprises a thin, flexible, transparent strip 20, preferably provided in roll form 2 I.

The strip preferably comprises a plastic pressure sensitive adhesive film having one surface 22 neutralized by coating with silica or other like medium to render it non-adhesive. While several such films are available for the purpose,

2 Claims, (Cl. 128156) one formed from the following ingredients in parts byweight has been found to be particularly effective: 1 parts hydrocarbon thermoplastic terpene resin 4 /2 parts adhesive comprising polybutene, hydrocarbon thermoplastic terpene resin, dioctyl 'phthalate, zinc stearate, naphtha 3 parts china clay 1 6 parts trichlorethylene 7 Referring to Figures 3, 4 and 5, each wound aid l comprises a thin, flexible, transparent strip 2 having an adhesive upper surface 3, a medicated cotton pad 4 disposed on the surface 3 intermediate its ends, and a non-adhesive covering strip 5 overlying the surface 3 and divided to provide free end portions 6 and 1 overlying the pad 4. The strip 2 is similar in composition to strip 20 and has its under surface 8 neutralized in the same manner as surface 22.

The pad 4 is preferably formed of cotton textile material impregnated with a suitable medicament. In one form of the invention, it is proposed to dip the cotton material in a solution containing about 10% of a quaternary ammonium salt, 1. e., 12.05 ounces of quaternary ammonium salt to one gallon of water. The material is then dried and cut into pads.

The covering strip 5 preferably comprises an aluminum foil, such as a thin paper 9 coated with aluminum l0.

For convenience of manufacture, sale and use, the article is preferably made up in assembly form as shown in Figures 5 and 6 wherein large sheets I l are provided in which a plurality of slits l2 are formed, such slits terminating in spaced relation to the ends of the sheets, thus providing .a unitary assembly of wound aids I, each readily detachable from the assembly.

The adhesive bandage 20 is applied in the normal way. In using the wound aid, the foil strips 5 are removed and'the wound aid applied in the usual manner. The transparency of the film 2 or 20 renders the device inconspicuous and the pliability thereof makes possible the normal flexing movement of any part of the body to which the wound aid is affixed, thus oecasioning a minimum of discomfort and annoyance to the wearer.

In the case of the wound aid, the overlying aluminum foil releases a small amount of aluminum salts, such as aluminum oxide, which become an important ingredient of the adhesive strip. Aluminum oxide is compatible with china clay, both of which act as drying agents to prevent the adhesive strip from becoming too sticky, The

3 aluminum salts also function to harden the adhesive mass and tend to increase its transparency.

Referring to Figures '7, 8 and 9, a slightly modified form of the invention is shown for use particularly as a corn pad. The device comprises a transparent plastic strip [3 similar to strip 2, and an overlying metallic foil covering strip I4 similar to strip 5 having free end portions [5 and I6. A medicated disc or pad 11 is carried by the strip 13 for application to the affected part. While various types of medicaments may be employed, a satisfactory pad comprises cotton fabric impregnated with a solution containing the following ingredients:

3 parts hydrocarbon thermoplastic terpene resin 7 parts adhesive comprising polybutene, hydrocarbon thermoplastic terpene resin, dioctyl phthalate, zinc stearate, naphtha 16 parts trichlorethylene 32 parts salicylic acid.

The strips I3 and M are preferably in elongated form as shown, tapering towards each end.

What is claimed is:

1. A bandage assembly having a substantially transparent plastic film sheet, one surface of said sheet being of pressure sensitive adhesive character, and a sheet of paper having only one surface thereof provided with a metallic coating substantially completely overlying said film .sheet with said metallic coating in adhesive contact with said adhesive surface, said superimposed sheets being longitudinally slit along a plurality of uniformly spaced lines, each slit extendin throughout the major portion of the length of the sheets and terminating inwardly of each end of the sheets, said slits defining a plurality of bandage strips having minor end portions in attached relation and each readily separable from the assemable to expose said adhesive surface and comprising a thin paper base and an aluminum coating on only one surface thereof, said aluminum coatin being in contact with the adhesive surface of the strip.

HENRY JOHN I HELDMANN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,115,237 Scholl Apr. 26, 1938 2,164,360 Strauch July 4, 1939 2,226,546 Bower Dec. 31, 1940 2,233,209 Herzog Feb. 25, 1941 2,292,995 Greenwoll Aug. 11, 1942 2,321,363 Crowley June 8,. 1943 2,399,545 Davis Apr. 30, 1946 FOREIGN PATENTS Number Country Date 12,350 Switzerland May 19, 1896 350,384 Great Britain June 4, 1931 OTHER REFERENCES Journal of Bacteriology. March 1945, page 288. 

2. A BANDAGE HAVING A SUBSTANTIALLY TRANSPARENT PLASTIC FILM STRIP, ONE SURFACR OF SAID STRIP BEING OF PRESSURE SENSITIVE ADHESIVE CHARACTER, AND A SHEET OF METALLIC FOIL SUBSTANTIALLY COMPLETELY OVERLYING SAID SURFACE AND ADHESIVELY SECURED THERETO, SAID SHEET BEING READILY REMOV- 